Finding the Fourth Proportional to 5,611.49, 7,687.77 and 5,401.29

Step by Step Solution

1. Step 1: Write the proportion equation
   5,611.49 : 7,687.77 = 5,401.29 : x
2. Step 2: Convert to fraction form
   5,611.49/7,687.77 = 5,401.29/x
3. Step 3: Cross multiply
   5,611.49x = 7,687.77 × 5,401.29
4. Step 4: Simplify right side
   5,611.49x = 41,523,875.22
5. Step 5: Solve for x
   x = 41,523,875.22/5,611.49
6. Step 6: Final answer
   x = 7,399.79